FAM. BLATTID^ 5 



presence 01 absence of spines on the lower borders of the femora, the shape of the supra-anal lamina 

 and of the sub-genital lamina in the female, the presence or absence of arolia between the tnisal claws, 

 and the structure of the wings. 



KEY TO rHE SUB-FAMILIES 



I. Femora spincd beneath. 



2. Last ventral segment of the female large, '.^nthout valves. 



3. Siipra-anal lamina of both sexes usually tranverse, narrvu\ Winos 

 K'hen present with an apical field, ulnar vein simple or bifurcate. 



Posterior femora usually sparsely armed with spines beneath . . i. Subfam. Ectobinm.;. 

 y . Supra-anal lamina of both sexes more or less produced, triangular or 

 emarginate. Wings cjhen present with or toithout triangular api- 

 cal field, ulnar vein ramose. Posterior femora usuallv stroiiglv 

 s fined beneath. 

 4. Supra-anal latnina of both sexes triangular, entire. Cerci project- 

 ing considerably beyond this lamina. 

 -1. Pronotum and tegmina smooth. The radial vein of the !,'ini;s 

 usually giving of to the anterior margin several parallel 



costal veins. Tarsi 7i>ith no fulvilli ^. Subfam. Phvi.i.odromin^. 



5'. Pronotum and tegmina covered with a silky pile. The radial 

 vein of the wings giving off to the anterior margin irregu- 

 lar costal veins. Tarsi provided with pulvilli . . . . 3. Subfam. Nyctiborin«. 

 4'. Snpra-anal lamina of the male more or less quadrate, -with obtuse 

 angles, ofi the female broadly rounded or lobate. Cerci not pro- 

 jecting beyond this lamina. Tarsi with distinct pulvilli. The 

 ulnar vein of the wings emitting parallel branches towards the 



dividing vein 4. Subfam. Epilamprix.*;. 



•2'. The last ventral abdominal segment of the female provided K'ith valves . 5. Subfam. Periplanetin*. 

 l'. Femora unarmed beneath (A few exceptions). 



2. Supra-anal lamina of both sexes more or less produced, its posterior 

 margin notched. 



3. Claws with a distinct arolium 6. Subfam. Panchlorin.*;. 



3'. Claws without or with a minute arolium. 



4. Wings with a folded fan-like anal field. Pronotum smooth . . 7. Subfam. Blaberin.-e. 

 4'. Anal field of the xt'ings ivith a single fold. Pronotum more or 



less pilose 8. Subfam. Corydin.e. 



2'. Supra-anal lamina of both sexes short, transverse, its posterior margin 

 straight or rounded . 

 3. Subgenital lamina of the male somewhat produced, furnished with a 

 single style. Claws with a distinct arolium (except in the genus 

 ParanauphcEta). 

 4. Anterior part of the wings pointed, or the wings with mucli pro- 

 duced apical field , or wings tivice as long as elytra, folded in 

 ^'cpose g_ Subfam. Oxvhaloin^. 



